Answer:
They are made of mostly rock
Explanation:
A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun, i.e. Mercury, Venus, Earth, and Mars. -Google
The statement correctly describes terrestrial planets as They are made of mostly rock. Thus, option "A" is correct.
The terrestrial planets are the planets, which are made up of heavy metals and rocks.
These have a hard surface. These planets have a molten metal core which is heavy. These planets have few moons and topological features such as volcanoes, craters and valleys.
All these terrestrial planets have typically the same type of structure which is the metallic core in the centre that is composed of iron and surrounded by the layer of silicate mantle.
Thus, option "A" is correct.
To learn more about terrestrial planets click here:
https://brainly.com/question/18089177
#SPJ2
